Defective mount detecting and segregating device



Sept; 1, 1936. .5. F. DONOVAN ET AL DEFECTIVE MOUNT DETECTING AND SEGREGA'RING DEVICE F iled June so, 1954 2 Sheets-Sheet 1 Inventors Josn I? Ilgonovgn, ohn law T2, by Thei Attorney Sept. 1, 1936. J. .F. DONOVAN ET AL 2,053,137

DEFECTIVE MOUNT DETECTING AND SEGREGATING DEVICE Filed June so, 1954 2 shelats sheet 2 Fig; 2.

Th h. h e

' Patented Sept. 1, 1936 UNITED STATES PATENT OFFICE DEFECTIVE MOUNT DETECTING AND SEGREGATING DEVICE New York Application June 30, 1934, Serial No. 733,158

11 Claims.

Our invention relates to devices used in the manufacture of incandescent lamps and similar devices which comprise a filament for automatically detecting and segregating defective filament mounts. The device is particularly suited for use on automatic lamp making machines, since it prevents a defective mount from completing the 'full course of lamp manufacturing operations before being discarded. An object of our invention therefore is to provide a device for detecting the presence of a defective mount. Among the defects detected are: the absence of a filament, an improperly mounted filament, the absence of one or more support or leadingin wires. and the presence of bent or distorted support or leading-in wires. A feature of our invention is the provision of means for automatically removing a mount from a lamp making machine to prevent further operations thereon. Further features and advantages of our invention will appear from the following description of species thereof and from the drawinss.

In the drawings, Fig. 1 is a plan view of a device comprising our invention; Fig. 2 is a side elevation thereof; Fig. 3 is a perspective view of feeler mechanism; and Fig. 4 is a wiring diagram of an electrical controlling circuit therefor.

The particular device shown in the drawings was designed for use with .filament mounting machines of the type disclosed in Patent 1,907,- 532, Flaws, issued May 9, 1933, and is preferab y supported on and operated from said machine.

The lamp mount I0 (Fig. 1) to be inspected is carried by a head ll of the mounting machine which, remains in the position shown during a cycle of operation of the inspection device. The said mount is located directly above the feeler mechanism shown in Fig. 3 with the stem tube l2 disposed between the fingers of a holder l3 and the fiare portion l4 immediately above said holder. The feeler mechanism illustrated consists of three feelers l5, l6 and II which are mounted on hubs l8, l9 and "respectively. The said feelers engage the filament 2| of the mount when they are moved upward. The said-hubs l3, l3 and 20 are mounted on a pin 22 in a bracket 23. Said bracket 23 is clamped to a rod 24 and is moved vertically upward by said rod. As the upward movement occurs, the blfurcate end portions 25 and 26 of each feeler strike the filament H on either side of each of the three support wires 21 with a force equivalent to the 5 effective weight of the weights 23 on the legs 23 of the i'eelers. After the feelers come in contact with the filament, as shown, the additional movement of bracket 23 causes the hubs l8, l9 and 20 to turn, thereby swinging the legs 29 of the feelers outward. The force with which 5 the feelers strike the filament is sufficient to loosen said filament from a support wire if said wire has become wedged between turns of the filament. Should one or more of the support wires be missing, bent out of place or not bent l0 completely around the filament, the feelers adjacent thereto will not be swung or rotated, but will instead be carried upward, and the leg 29 thereof will hang vertically as shown. A missing filament 2|, or leading-in wire 30 or 3|, as 15 well as a filament not clamped to the leadingin wires will also result in the failure of a feeler to be rotated. Stop pin 32 in bracket 23 prevents counterclockwise rotation of the feeler legs and determines the rest position thereof. 20

The defective mounts are removed by the holder l3 from the mounting machine head II which is opened by mechanism controlled by the position of the feelers. Both operations are electricaily controlled by a circuit operated by the 25 switching mechanism shown in Fig. 3. The said switching mechanism consists of a pair of contact arms 33 and 34 which carry contacts 35 and 36 respectively, and is brought into operative relation to the feeler mechanism after 30 the feeling operation has been performed by an upward movement of rod 43 into the position shown. Contact arm 33 is mounted on a lever 31 which is supported on a pin 38 on a bracket 39 which is mounted on the rod 49. Sold arm 35 33 is kept from making contact with the other arm 34 by a spring 40 which is located between a post 4| in the lever and a post 42 in bracket 39. Contact arm 34 is mounted on an insulating block 43 in bracket 39. The upward movement 40 of the mechanism is not completed until contact arm 33 is brought against the end of a'verticall'y hanging feeler leg 29 should one or more be hanging in this position. If the mount is defective and one of the legs is hanging vertically, 45 contact arm 33 will be pressed down so the contacts 35 and 36 will touch each other and the latch 44 will slip over pin 45 in lever 31, holding the contacts together. The said latch 44 is turned about pin 45 in bracket by a spring 50 41 extendingbetween a post in the latch and a post in the bracket. The feeler mechanism is insulated from the rest of the machine by insulating bushing 48. Both the feeler mechanism and the switch mechanism are supported through are reciprocated vertically in standard 58 (Fig.

2) by cam operated mechanism (not shown) associated with the mounting machine.

As shown by the wiring diagram in Fig. 4, the feeler switch serves indirectly to ground circuits through solenoids 5| and 52 which are connected to one lead of the secondary of transformer 53. The other secondary lead from the transformer is grounded to the mounting machine and the primary of said transformer is connected to a source of electricity. The solenoid 5| causes the mounting machine head II to open and release the mount into holder I3 so that it may be removed thereby. As shown in Fig. l, solenoid 5| is coupled to rod 54 by link 55, and when operated, causes rod 54 to shift so that pin 58 in lever 51 shifts to pocket 58 in said rod. This motion is produced against the pull of spring 58 which extends between a post in the rod and another post in a stationary part of the machine. Normally the said spring 58 holds the rod 54 in such a position that pin 58 is in groove 58'- in the rod and is therefore not affected by the longitudinal movement. On the other hand when said pin 58 is in the pocket 58, a longitudinal movement of rod 54 causes the pin to be moved. Movement of pin 58 turns lever 51 about pin 88, causing pin 8| in the lever to strike the release arm 82 of the mounting machine head. -When arm 82 turns the jaws of the head II open and release the mount into holder I3. Solenoid 52 operates mechanism which causes the holder I3 to be removed or indexed away to allow an empty holder to be brought into position when the next mounting machine head is presented before the inspection device.

The holder I3 receiving the defective mount is one of a plurality of holders fastened at intervals to an endless chain 83 which is supported at this location by sprocket 84. The sprocket 84 is mounted on a shaft which is mounted on a bracket 88 and supports pairs of jaws 88, 81 which ensure the removal of broken stem arbors 88 as hereinafter explained. The said bracket 88 is slidably mounted on rods 18 and H extending from standard 58, and is moved back and forth thereon toplace the holders I3 about the lamp stem tube, by lever I2 (Fig. 2) which it engages through pin 13. Lever 12 is turned by mechanism (not shown) of the mounting machine and moves the entire sprocket 84 and .chain forward thereby disposing the fingers of a holder I8 around the stem tube I2 of a mount in the machine head each time a head is indexed into a position before the device, and moves the chain back while the machine heads are indexing.

If the mount being inspected is defective, solenoid 52 will have turned rod 14 about pin 15, so that pin 18 in lever 11 will be located in the pocket 18 in said rod and latch 18 will have caught pin 88 in the rod, holding it in this position. The

fected by the back and forth movement thereof.

When the pin 18 is in pocket 18, the movement of bracket 88 turns lever 11, causing the pawl 85 carried thereby on pin 88, to turn the ratchet wheel 81 and shaft 85 on which said wheel is mounted. This motion indexes an empty holder into the operating position and pulls a contact finger 88, which permits the inspection device to operate only when the mount machine head contains a mount, away from the said head.

The contact finger 88 .is connected by wire 88 to the feeler switch 33-34 and is mounted on insulating block 88 on shaft 8|. During the inspection operation, the shaft 8| is turned so that the finger 88 makes contact with the mounting machine head II if the head contains a mount but does not contact with the head if it is empty. Whether or not the finger 88 makes contact with the head is determined by the position of the stem holding jaws therein. When the said jaws contain a mount they are, of course, extended and cause the head to engage said finger 88. In the contacting position, arm 82 on shaft 8i is against a stop screw 83 in post 84 against which it is held by spring 85. The spring extends between a post in bar 88 which is attached to arm 82 and post 84. The withdrawing of the chain mechanism from the mounting machine causes the pin 81 on bracket 88 to move in the slot 88 in bar 88 until it reaches the end thereof, whereupon the said bar is actuated and pulls the contact finger 88 away from the mounting machine head II.

The stem arbor gripping jaws 88, 81 are mounted on a turret I88 which is mounted on the shaft 85 below the sprocket 84. The said jaws are provided for the purpose of insuring removal of broken arbors from on top of the feelers I5, I8, I1 so said feelers may operate properly. The jaws 88, 81 are located below the mount holders I3 as said holders pass around the sprocket 84. The stationary jaw 88 is mounted on a post 88 in turret I88 and the movable jaw 81 is mounted on an arm IN on post I82 in said turret. When the sprocket 84 and shaft 85 are advanced toward the feeler mechanism, the jaws 88, 81 are held open by a cam I83 which is fastened to the bracket 88 and is engaged by roller I84 in arm I8I.- Upon rotation of the turret I88, the roller I 84 passes from the cam I83, and a torsion spring I85, which is located about post I82 and engages turret I88 and arm I8I, closes the said jaws. The jaws remain closed until the roller again engages the said cam I83, which occurs when the .holder I3 below which the roller is located leaves the periphery of the sprocket 84.

The feeler and its switch mechanism move down to permit indexing of the mounting machineheads II which take the path indicated by the dot-dash line I85. Upon reaching the lower limit of movement of said feeler mechanism, an arm (not shown) on latch 44 of the switching mechanism strikes pin I88 (Fig. 2), causing lever 31 to be released,'and permitting the contacts 35 and 38 to be drawn apart. With the advancing movement of the chain 83 and sprocket 84 toward the mounting machine head I I, one end of latch 18 is struck by a portion of lever 11, causing said latch to turn and be disengaged from pin 88 to release the rod 14.

What we claim as new and desire to secure by LettersPatent in the United States is: I 1. In a device of the class described, a movable holder for incandescent lamp mounts comprising a filament and support wires engaging said filament, an inspection device disposed adjacent the path of movement of said holder comprising a feeler, mechanism for advancing said feeler toward .said mount, said feeler being adapted to engage said filament and be displaced thereby when said filament is properly located on said mount, and means operated by said feeler upon failure thereof to be displaced due to an improperly mounted filament or to the absence of a filament for indicating the presence of the defective mount in said holder.

2. In a device of the class described, a movable holder for incandescent lamp mounts comprising a filament and support wires engaging said filament, an inspection device disposed adjacent the path of movement of said holder'comprising a pivotally mounted feeler'balanced on its pivot so as to be swung freely thereon by a comparatively slight force, mechanism for advancing said feeler toward said mount, said feeler being adapted to engage said filament and be pivoted thereby when said filament is properly located on said mount, and means operated by said feeler upon failure thereof to be displaced due to an improperly mounted filament or to the absence of a filament for indicating the presence of the defective mount in said holder.

said filament, an inspection device disposed adjacent the path of movement of said holder comprising a pivotally mounted feeler balanced on its pivot so as to be swung freely thereon by a comparatively slight force and consisting of a. laterally ofisetportion adapted to engage said filament and a" substantially vertically depending leg portion adapted to be displaced from its vertical position when said-laterally. ofi'set portion engages a filament properly located in said mount, means for raising said feeler toward said mount, and means operated by said depending leg portion of said feeler upon failure thereof to be displaced due to an improperly mounted filament or to the absence of a filament for indicating the presence of a defective mount in said holder.

4. In a device of the ,class described, a movable holder for incandescent lamp mounts comprising a filament and support wires engaging said filament, an inspection device disposed adjacent the path of movement of said holder comprising a feeler, mechanism for advancing said feeler toward said mount, said feeler being adapted to engage said filament and be displaced thereby when said filament is properly located on said mount,

. and an electrical circuit including switch means operated by said feeler upon failure thereof to be displaced due to an improperly mounted filament or to the absence of a filament for indicating the presence of the defective mount in said holder. 5. In a device of the class described, a movable holder for incandescent lamp mounts comprising a filament and support wires engaging said filament, an inspection device disposed adjacent the path of movement of said holder comprising a pluralityof feelers having bifurcate end portions, mechanism for advancing said feelers toward said mount, said bifurcate end portions of each of said feelers being adapted to engage said filament on either side of a support wire and be displaced thereby when said filament -is'properly located in said mount, and means operated by port wires engaging said filament, with an inspection device disposed adjacent the path of movement of said heads and comprising a feeler, mechanism for advancing said feeler toward a mount in one of said mounting machine heads, said feeler being adapted to engage a filament in said mount and be displaced thereby when said filament is properly located on said mount, mount removing mechanism comprising holding means located adjacent said mount, means operated by said feeler upon failure thereof to be displaced due to an improperly mounted filament or to the absence of a filament for causing said mounting machine head to release the defective mount to the holding means of said mount removing mechanism, and means for actuating said mount removing mechanism to carry said defective mountaway from said mounting machine mead. I

7. The combina ion of a filament mounting machine comprising a plurality of heads for sup porting mounts comprising a filament and support wires engaging said filament, with an inspection device disposed adjacent the path of movement of said heads and comprising a feeler, mechanism for advancing said feeler toward a mount in one of said mounting machine heads, said feeler being adapted to engage a filament in said mount and be displaced thereby when said filament is properly located on said mount, mount removing mechanism comprising holding means located adjacent said mount, an electrical circuit including switch means operated by said feeler upon failure thereof to be displaced due to an improperly mounted filament "or to the absence of a filament for causing said mounting machine head to release the defective mount to the holding means of said mount removing mechanism and for also causing said mount removing mechanism to carry said defective mount away from said mounting machine head.

8. The combination of a filament mounting machine comprising a plurality of heads for supporting mounts comprising a filament and support wires engaging said filament, with an inspection device disposed adjacent the path of movement of said'heads and comprising a feeler, mechanism for advancing said feeler toward a mount in one of said mounting machine heads, said feeler being adapted to engage a filament in said mount and be displaced thereby when said filament is properly located on said mount, mount removing mechanism comprising holding means located adjacent said mount, an electrical circuit including two solenoids and a switch means operated by said feeler upon failure thereof to be displaced due to an improperly mounted filament or to the absence of a filament, one of said solenoids causing said mounting machine head to release the defective mount to the holding means of said mount removing mechanism and the other of said solenoids causing said moimt removing mechanism to carry said defective mount away from said mountingrmachine head.

9. In a device of the type described, mechanisfii for removing defective'mounts comprising a filament and supports therefor from supporting heads in a filament mounting machine comprising a sprocket, a chain carried thereby, a plurality of holders disposed at spaced-intervals on said chain, means for advancing said sprocket toward one of said heads in said filament mounting machine to bring one of said holders to a position adjacent a mount in. said-head, inspection means for detecting the presence of a mount in said head having either an improperly mounted filament or no filament at all, mechanism operated by said inspection means for causing said head to release a defective mount to the said holderadjacent thereto and for causing said sprocket and chain to be indexed to carry said defective mount away from said filament mounting machine head.

10. In a device of the class described, a holder for an incandescent lamp mount comprising a filament and support wires engaging said filament, an inspection device disposed adjacent said holder and comprising a feeler, mechanism for advancing said feeler toward said mount, said feeler being adapted to engage said filament and properly mounted filament or to the absence of a filament, and an electrical circuit including said a switch means for indicating the presence or the detective mount in the holder.

11. In a device of the class described, a movable holder for incandescent lamp mounts comprising a filament and support wires engaging said filament, an inspection device disposed adjacent the path of movement of said holder comprising a pivotally mounted feeler balanced on its pivot so as to be swung freely thereon by a comparatively slight force and consisting of a laterally ofi'set portion adapted to engage said filament and a substantially vertically depending leg portion adapted to be displaced from its vertical position when said laterally oil'set portion engages a filament properly located in said mount, means for raising said ieeler toward said mount, electrical switch means disposed adjacent said feeler, mechanism for raising said switch means toward said depending leg portion of said feeler, said switch means being adapted to engage said depending leg portion of said ieeler and be closed thereby upon failure thereof to be displaced due to an improperly mounted fila ment or to the absence of a filament, and an electrical circuit including said switch means for indicating the presence of the defective mount in the holder.

JOHN FLAWS, JR. JOHN F. DONOVAN. 

